Model BNT SERIES

THK’s Ball Screw Transport Ball Screw Model BNT SERIES represents a specialized advancement in linear motion technology, engineered specifically for high-speed, high-frequency transport applications demanding exceptional precision and reliability. This series incorporates a unique ball screw design where the screw shaft remains stationary while the nut rotates and moves linearly, optimizing performance in automated material handling, assembly lines, and precision positioning systems. The BNT SERIES is characterized by its compact, lightweight construction, which reduces inertial forces and enables rapid acceleration and deceleration, crucial for maximizing throughput in dynamic industrial environments.

Key technical features of the BNT SERIES include a precision-ground screw shaft with optimized groove geometry, ensuring smooth ball recirculation and minimal vibration during operation. The nut unit integrates a high-capacity, preloaded ball bearing system that eliminates backlash and maintains rigidity under varying loads. Advanced sealing mechanisms protect internal components from contaminants like dust and debris, extending service life in harsh conditions. Additionally, the series offers customizable options for screw diameters, leads, and mounting configurations, allowing seamless integration into diverse machinery layouts.

Performance advantages are evident in its operational efficiency and durability. The BNT SERIES achieves high positional accuracy and repeatability, with lead errors controlled to within microns, making it ideal for applications requiring meticulous alignment. Its low-noise design reduces workplace disturbances, while efficient lubrication systems minimize maintenance intervals. The ball screw’s high thrust capacity and thermal stability ensure consistent performance even under continuous, high-cycle operations, reducing downtime and total cost of ownership.

Typical applications span multiple sectors, leveraging the BNT SERIES’ versatility. In industrial machinery, it drives automated guided vehicles (AGVs), robotic arms, and packaging equipment, where speed and precision enhance production line efficiency. Automotive systems utilize these ball screws in assembly robots, welding fixtures, and testing apparatus, benefiting from their resilience in high-temperature and high-vibration environments. For precision equipment, the series is employed in semiconductor manufacturing tools, medical devices, and optical alignment systems, where sub-micron accuracy is paramount. By combining innovative design with robust engineering, the THK BNT SERIES delivers a reliable solution for modern automation challenges, supporting advancements in productivity and technological innovation across industries.

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Model No. Screw
shaft
outer
diameter

d
Lead


Ph
Ball
center-to-
center
diameter

dp

Outer
diameter

D
g6
Flange
diameter


D1
Overall
length


L1
Basic load rating
Dynamic
rating

Ca
Static
rating

C0a
mm mm mm mm mm mm kN kN
BNT 1404-3.6 (Rolled) Ball Screw
14
4
14.4
35
5.5
11.5
BNT 1405-2.6 (Rolled) Ball Screw
14
5
14.5
35
5
11.4
BNT 1605-2.6 (Rolled) Ball Screw
16
5
16.75
36
5.4
13.3
BNT 1808-3.6 (Rolled) Ball Screw
18
8
19.3
56
13.1
31
BNT 2005-2.6 (Rolled) Ball Screw
20
5
20.5
35
6
16.5
BNT 2010-2.6 (Rolled) Ball Screw
20
10
21.25
58
10.6
25.1
BNT 2505-2.6 (Rolled) Ball Screw
25
5
25.5
35
6.7
20.8
BNT 2510-5.3 (Rolled) Ball Screw
25
10
26.8
94
31.2
83.7
BNT 2806-2.6(Rolled) Ball Screw
28
6
28.5
42
7
23.4
BNT 2806-5.3(Rolled) Ball Screw
28
6
28.5
67
12.8
46.8
BNT 3210-2.6(Rolled) Ball Screw
32
10
33.75
64
19.8
53.8
BNT 3210-5.3(Rolled) Ball Screw
32
10
33.75
94
36
107.5
BNT 3610-2.6(Rolled) Ball Screw
36
10
37
64
20.8
59.3
BNT 3610-5.3(Rolled) Ball Screw
36
10
37
96
37.8
118.7
BNT 4512-5.3(Rolled) Ball Screw
45
12
46.5
115
49.5
169